Is Your Cadillac or Buick Experiencing Frustrating Engine Problems?
If you’re dealing with a check engine light that won’t go away, unexplained stalling, rough idling, or a no-start condition in your 2004-2007 Cadillac CTS, SRX, or other compatible GM vehicle, a failing Engine Control Module (ECM) is a very likely culprit. The ECM is the central computer of your vehicle, responsible for managing everything from fuel injection and ignition timing to transmission shifting and emissions control. When it begins to fail, it can create a cascade of confusing and often intermittent issues that are difficult to diagnose.
From the Diagnostic Bay
We once had a 2006 Cadillac SRX come into the shop with a complaint of random stalling at stoplights. The owner had already spent a small fortune replacing the crankshaft position sensor, camshaft sensors, and even the throttle body based on generic trouble codes. The problem persisted. After hooking up our professional scan tool and monitoring live data, we noticed erratic voltage readings coming directly from the ECM’s internal processor right before a stall event. The sensors were just reporting the bad information the faulty computer was creating. We installed a VIN-programmed ECM, performed the security relearn, and the vehicle ran perfectly. It’s a classic case of treating the disease, not just the symptoms, and it highlights the critical role a properly functioning ECM plays.
Common Symptoms of a Failing Engine Control Module
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling or shutting off unexpectedly while driving.
- ✔ Rough or erratic idling and poor engine performance.
- ✔ Noticeable decrease in fuel economy.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Communication errors with diagnostic scan tools.
Why Our Programmed 2004-2007 CTS ECM is the Right Choice
Don’t settle for a generic, unprogrammed module that will require an expensive trip to the dealership. This is a genuine, used OEM Engine Control Module that has been thoroughly tested and is ready for service. The critical difference is our professional programming service. When you purchase from us, you provide your vehicle’s 17-digit Vehicle Identification Number (VIN). We then use that VIN to flash the module with the latest, most stable software updates directly from GM. This ensures that the computer is perfectly matched to your vehicle’s specific configuration, including its engine, transmission, and factory options. This process eliminates compatibility issues and makes installation as straightforward as possible.
This module, identified by service numbers 19260507 or 12592124, is a direct replacement for the original unit in a wide range of GM vehicles. By installing a correctly programmed ECM, you restore the precise calculations needed for optimal engine performance, fuel efficiency, and emissions, effectively resolving the root cause of your vehicle’s issues.
Simple Process, Lasting Solution
- ✔ Place Your Order: Add this item to your cart and complete the checkout process.
- ✔ Provide Your VIN: Reply to your order confirmation email or use the contact form to send us your vehicle’s 17-digit VIN.
Vehicle Fitment Information
This ECM is a confirmed fit for the following vehicles and options. Please verify your part number or service number matches one of the compatible numbers (12581144, 12588472, 12592124, 19260507) to ensure proper fitment.
- Cadillac CTS: 2004-2006 (Base, ID 12592124 or 19260507)
- Cadillac CTS: 2007 (Base)
- Cadillac SRX: 2004-2006 (3.6L Engine)
- Buick Allure: 2005-2008 (3.6L Engine)
- Buick LaCrosse: 2005-2008 (3.6L Engine)
- Buick Rendezvous: 2004-2005 (ID 19260507)
- Buick Rendezvous: 2006 (3.6L Engine)
Frequently Asked Questions
What exactly is an ECM?
The ECM, or Engine Control Module, is your car’s main computer. It takes data from sensors all over the engine and uses it to control fuel delivery, spark timing, and other critical functions to make the engine run efficiently and cleanly.
Is any additional programming required after I install it?
Because we pre-program the module to your VIN, no further programming for engine or transmission operation is needed. However, on many GM vehicles, you may need to perform a simple security relearn procedure (often called a Passlock or anti-theft relearn) which can typically be done without special tools. Instructions are widely available online or in service manuals.
How do I send you my VIN?
After you place your order, simply reply to the order confirmation email with your 17-digit VIN. You can find the VIN on your vehicle’s dashboard (visible through the windshield on the driver’s side), on the driver’s side door jamb sticker, or on your insurance and registration documents.
Is this a new part?
No, this is a genuine, used OEM part that was sourced from a salvaged vehicle. Each unit is inspected and tested to ensure it is fully functional before being programmed and shipped.
How can I be sure the ECM is my problem?
While the symptoms listed are strong indicators, professional diagnosis is always recommended. Common diagnostic trouble codes pointing to an ECM failure include P0601, P0603, P0604, P0605, and P0606. If you are experiencing multiple, unrelated error codes, it can also point to a faulty main computer.